pthread.h
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上传日期:2009-04-28
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- /* Linuxthreads - a simple clone()-based implementation of Posix */
- /* threads for Linux. */
- /* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr) */
- /* */
- /* This program is free software; you can redistribute it and/or */
- /* modify it under the terms of the GNU Library General Public License */
- /* as published by the Free Software Foundation; either version 2 */
- /* of the License, or (at your option) any later version. */
- /* */
- /* This program is distributed in the hope that it will be useful, */
- /* but WITHOUT ANY WARRANTY; without even the implied warranty of */
- /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
- /* GNU Library General Public License for more details. */
- #ifndef _PTHREAD_H
- #define _PTHREAD_H 1
- #include <features.h>
- #include <sched.h>
- #include <time.h>
- #define __need_sigset_t
- #include <signal.h>
- #include <bits/pthreadtypes.h>
- #include <bits/initspin.h>
- __BEGIN_DECLS
- /* Initializers. */
- #define PTHREAD_MUTEX_INITIALIZER
- {0, 0, 0, PTHREAD_MUTEX_TIMED_NP, __LOCK_INITIALIZER}
- #ifdef __USE_GNU
- # define PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
- {0, 0, 0, PTHREAD_MUTEX_RECURSIVE_NP, __LOCK_INITIALIZER}
- # define PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP
- {0, 0, 0, PTHREAD_MUTEX_ERRORCHECK_NP, __LOCK_INITIALIZER}
- # define PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
- {0, 0, 0, PTHREAD_MUTEX_ADAPTIVE_NP, __LOCK_INITIALIZER}
- #endif
- #define PTHREAD_COND_INITIALIZER {__LOCK_INITIALIZER, 0, "", 0}
- #if defined __USE_UNIX98 || defined __USE_XOPEN2K
- # define PTHREAD_RWLOCK_INITIALIZER
- { __LOCK_INITIALIZER, 0, NULL, NULL, NULL,
- PTHREAD_RWLOCK_DEFAULT_NP, PTHREAD_PROCESS_PRIVATE }
- #endif
- #ifdef __USE_GNU
- # define PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP
- { __LOCK_INITIALIZER, 0, NULL, NULL, NULL,
- PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP, PTHREAD_PROCESS_PRIVATE }
- #endif
- /* Values for attributes. */
- enum
- {
- PTHREAD_CREATE_JOINABLE,
- #define PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_JOINABLE
- PTHREAD_CREATE_DETACHED
- #define PTHREAD_CREATE_DETACHED PTHREAD_CREATE_DETACHED
- };
- enum
- {
- PTHREAD_INHERIT_SCHED,
- #define PTHREAD_INHERIT_SCHED PTHREAD_INHERIT_SCHED
- PTHREAD_EXPLICIT_SCHED
- #define PTHREAD_EXPLICIT_SCHED PTHREAD_EXPLICIT_SCHED
- };
- enum
- {
- PTHREAD_SCOPE_SYSTEM,
- #define PTHREAD_SCOPE_SYSTEM PTHREAD_SCOPE_SYSTEM
- PTHREAD_SCOPE_PROCESS
- #define PTHREAD_SCOPE_PROCESS PTHREAD_SCOPE_PROCESS
- };
- enum
- {
- PTHREAD_MUTEX_TIMED_NP,
- PTHREAD_MUTEX_RECURSIVE_NP,
- PTHREAD_MUTEX_ERRORCHECK_NP,
- PTHREAD_MUTEX_ADAPTIVE_NP
- #ifdef __USE_UNIX98
- ,
- PTHREAD_MUTEX_NORMAL = PTHREAD_MUTEX_TIMED_NP,
- PTHREAD_MUTEX_RECURSIVE = PTHREAD_MUTEX_RECURSIVE_NP,
- PTHREAD_MUTEX_ERRORCHECK = PTHREAD_MUTEX_ERRORCHECK_NP,
- PTHREAD_MUTEX_DEFAULT = PTHREAD_MUTEX_NORMAL
- #endif
- #ifdef __USE_GNU
- /* For compatibility. */
- , PTHREAD_MUTEX_FAST_NP = PTHREAD_MUTEX_ADAPTIVE_NP
- #endif
- };
- enum
- {
- PTHREAD_PROCESS_PRIVATE,
- #define PTHREAD_PROCESS_PRIVATE PTHREAD_PROCESS_PRIVATE
- PTHREAD_PROCESS_SHARED
- #define PTHREAD_PROCESS_SHARED PTHREAD_PROCESS_SHARED
- };
- #if defined __USE_UNIX98 || defined __USE_XOPEN2K
- enum
- {
- PTHREAD_RWLOCK_PREFER_READER_NP,
- PTHREAD_RWLOCK_PREFER_WRITER_NP,
- PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP,
- PTHREAD_RWLOCK_DEFAULT_NP = PTHREAD_RWLOCK_PREFER_WRITER_NP
- };
- #endif /* Unix98 */
- #define PTHREAD_ONCE_INIT 0
- /* Special constants */
- #ifdef __USE_XOPEN2K
- /* -1 is distinct from 0 and all errno constants */
- # define PTHREAD_BARRIER_SERIAL_THREAD -1
- #endif
- /* Cleanup buffers */
- struct _pthread_cleanup_buffer
- {
- void (*__routine) (void *); /* Function to call. */
- void *__arg; /* Its argument. */
- int __canceltype; /* Saved cancellation type. */
- struct _pthread_cleanup_buffer *__prev; /* Chaining of cleanup functions. */
- };
- /* Cancellation */
- enum
- {
- PTHREAD_CANCEL_ENABLE,
- #define PTHREAD_CANCEL_ENABLE PTHREAD_CANCEL_ENABLE
- PTHREAD_CANCEL_DISABLE
- #define PTHREAD_CANCEL_DISABLE PTHREAD_CANCEL_DISABLE
- };
- enum
- {
- PTHREAD_CANCEL_DEFERRED,
- #define PTHREAD_CANCEL_DEFERRED PTHREAD_CANCEL_DEFERRED
- PTHREAD_CANCEL_ASYNCHRONOUS
- #define PTHREAD_CANCEL_ASYNCHRONOUS PTHREAD_CANCEL_ASYNCHRONOUS
- };
- #define PTHREAD_CANCELED ((void *) -1)
- /* Function for handling threads. */
- /* Create a thread with given attributes ATTR (or default attributes
- if ATTR is NULL), and call function START_ROUTINE with given
- arguments ARG. */
- extern int pthread_create (pthread_t *__restrict __threadp,
- __const pthread_attr_t *__restrict __attr,
- void *(*__start_routine) (void *),
- void *__restrict __arg) __THROW;
- /* Obtain the identifier of the current thread. */
- extern pthread_t pthread_self (void) __THROW;
- /* Compare two thread identifiers. */
- extern int pthread_equal (pthread_t __thread1, pthread_t __thread2) __THROW;
- /* Terminate calling thread. */
- extern void pthread_exit (void *__retval) __attribute__ ((__noreturn__));
- /* Make calling thread wait for termination of the thread TH. The
- exit status of the thread is stored in *THREAD_RETURN, if THREAD_RETURN
- is not NULL. */
- extern int pthread_join (pthread_t __th, void **__thread_return);
- /* Indicate that the thread TH is never to be joined with PTHREAD_JOIN.
- The resources of TH will therefore be freed immediately when it
- terminates, instead of waiting for another thread to perform PTHREAD_JOIN
- on it. */
- extern int pthread_detach (pthread_t __th) __THROW;
- /* Functions for handling attributes. */
- /* Initialize thread attribute *ATTR with default attributes
- (detachstate is PTHREAD_JOINABLE, scheduling policy is SCHED_OTHER,
- no user-provided stack). */
- extern int pthread_attr_init (pthread_attr_t *__attr) __THROW;
- /* Destroy thread attribute *ATTR. */
- extern int pthread_attr_destroy (pthread_attr_t *__attr) __THROW;
- /* Set the `detachstate' attribute in *ATTR according to DETACHSTATE. */
- extern int pthread_attr_setdetachstate (pthread_attr_t *__attr,
- int __detachstate) __THROW;
- /* Return in *DETACHSTATE the `detachstate' attribute in *ATTR. */
- extern int pthread_attr_getdetachstate (__const pthread_attr_t *__attr,
- int *__detachstate) __THROW;
- /* Set scheduling parameters (priority, etc) in *ATTR according to PARAM. */
- extern int pthread_attr_setschedparam (pthread_attr_t *__restrict __attr,
- __const struct sched_param *__restrict
- __param) __THROW;
- /* Return in *PARAM the scheduling parameters of *ATTR. */
- extern int pthread_attr_getschedparam (__const pthread_attr_t *__restrict
- __attr,
- struct sched_param *__restrict __param)
- __THROW;
- /* Set scheduling policy in *ATTR according to POLICY. */
- extern int pthread_attr_setschedpolicy (pthread_attr_t *__attr, int __policy)
- __THROW;
- /* Return in *POLICY the scheduling policy of *ATTR. */
- extern int pthread_attr_getschedpolicy (__const pthread_attr_t *__restrict
- __attr, int *__restrict __policy)
- __THROW;
- /* Set scheduling inheritance mode in *ATTR according to INHERIT. */
- extern int pthread_attr_setinheritsched (pthread_attr_t *__attr,
- int __inherit) __THROW;
- /* Return in *INHERIT the scheduling inheritance mode of *ATTR. */
- extern int pthread_attr_getinheritsched (__const pthread_attr_t *__restrict
- __attr, int *__restrict __inherit)
- __THROW;
- /* Set scheduling contention scope in *ATTR according to SCOPE. */
- extern int pthread_attr_setscope (pthread_attr_t *__attr, int __scope)
- __THROW;
- /* Return in *SCOPE the scheduling contention scope of *ATTR. */
- extern int pthread_attr_getscope (__const pthread_attr_t *__restrict __attr,
- int *__restrict __scope) __THROW;
- #ifdef __USE_UNIX98
- /* Set the size of the guard area at the bottom of the thread. */
- extern int pthread_attr_setguardsize (pthread_attr_t *__attr,
- size_t __guardsize) __THROW;
- /* Get the size of the guard area at the bottom of the thread. */
- extern int pthread_attr_getguardsize (__const pthread_attr_t *__restrict
- __attr, size_t *__restrict __guardsize)
- __THROW;
- #endif
- /* Set the starting address of the stack of the thread to be created.
- Depending on whether the stack grows up or down the value must either
- be higher or lower than all the address in the memory block. The
- minimal size of the block must be PTHREAD_STACK_MIN. */
- extern int pthread_attr_setstackaddr (pthread_attr_t *__attr,
- void *__stackaddr) __THROW;
- /* Return the previously set address for the stack. */
- extern int pthread_attr_getstackaddr (__const pthread_attr_t *__restrict
- __attr, void **__restrict __stackaddr)
- __THROW;
- #ifdef __USE_XOPEN2K
- /* The following two interfaces are intended to replace the last two. They
- require setting the address as well as the size since only setting the
- address will make the implementation on some architectures impossible. */
- extern int pthread_attr_setstack (pthread_attr_t *__attr, void *__stackaddr,
- size_t __stacksize) __THROW;
- /* Return the previously set address for the stack. */
- extern int pthread_attr_getstack (__const pthread_attr_t *__restrict __attr,
- void **__restrict __stackaddr,
- size_t *__restrict __stacksize) __THROW;
- #endif
- /* Add information about the minimum stack size needed for the thread
- to be started. This size must never be less than PTHREAD_STACK_MIN
- and must also not exceed the system limits. */
- extern int pthread_attr_setstacksize (pthread_attr_t *__attr,
- size_t __stacksize) __THROW;
- /* Return the currently used minimal stack size. */
- extern int pthread_attr_getstacksize (__const pthread_attr_t *__restrict
- __attr, size_t *__restrict __stacksize)
- __THROW;
- #ifdef __USE_GNU
- /* Initialize thread attribute *ATTR with attributes corresponding to the
- already running thread TH. It shall be called on unitialized ATTR
- and destroyed with pthread_attr_destroy when no longer needed. */
- extern int pthread_getattr_np (pthread_t __th, pthread_attr_t *__attr) __THROW;
- #endif
- /* Functions for scheduling control. */
- /* Set the scheduling parameters for TARGET_THREAD according to POLICY
- and *PARAM. */
- extern int pthread_setschedparam (pthread_t __target_thread, int __policy,
- __const struct sched_param *__param)
- __THROW;
- /* Return in *POLICY and *PARAM the scheduling parameters for TARGET_THREAD. */
- extern int pthread_getschedparam (pthread_t __target_thread,
- int *__restrict __policy,
- struct sched_param *__restrict __param)
- __THROW;
- #ifdef __USE_UNIX98
- /* Determine level of concurrency. */
- extern int pthread_getconcurrency (void) __THROW;
- /* Set new concurrency level to LEVEL. */
- extern int pthread_setconcurrency (int __level) __THROW;
- #endif
- #ifdef __USE_GNU
- /* Yield the processor to another thread or process.
- This function is similar to the POSIX `sched_yield' function but
- might be differently implemented in the case of a m-on-n thread
- implementation. */
- extern int pthread_yield (void) __THROW;
- #endif
- /* Functions for mutex handling. */
- /* Initialize MUTEX using attributes in *MUTEX_ATTR, or use the
- default values if later is NULL. */
- extern int pthread_mutex_init (pthread_mutex_t *__restrict __mutex,
- __const pthread_mutexattr_t *__restrict
- __mutex_attr) __THROW;
- /* Destroy MUTEX. */
- extern int pthread_mutex_destroy (pthread_mutex_t *__mutex) __THROW;
- /* Try to lock MUTEX. */
- extern int pthread_mutex_trylock (pthread_mutex_t *__mutex) __THROW;
- /* Wait until lock for MUTEX becomes available and lock it. */
- extern int pthread_mutex_lock (pthread_mutex_t *__mutex) __THROW;
- #ifdef __USE_XOPEN2K
- /* Wait until lock becomes available, or specified time passes. */
- extern int pthread_mutex_timedlock (pthread_mutex_t *__restrict __mutex,
- __const struct timespec *__restrict
- __abstime) __THROW;
- #endif
- /* Unlock MUTEX. */
- extern int pthread_mutex_unlock (pthread_mutex_t *__mutex) __THROW;
- /* Functions for handling mutex attributes. */
- /* Initialize mutex attribute object ATTR with default attributes
- (kind is PTHREAD_MUTEX_TIMED_NP). */
- extern int pthread_mutexattr_init (pthread_mutexattr_t *__attr) __THROW;
- /* Destroy mutex attribute object ATTR. */
- extern int pthread_mutexattr_destroy (pthread_mutexattr_t *__attr) __THROW;
- /* Get the process-shared flag of the mutex attribute ATTR. */
- extern int pthread_mutexattr_getpshared (__const pthread_mutexattr_t *
- __restrict __attr,
- int *__restrict __pshared) __THROW;
- /* Set the process-shared flag of the mutex attribute ATTR. */
- extern int pthread_mutexattr_setpshared (pthread_mutexattr_t *__attr,
- int __pshared) __THROW;
- #ifdef __USE_UNIX98
- /* Set the mutex kind attribute in *ATTR to KIND (either PTHREAD_MUTEX_NORMAL,
- PTHREAD_MUTEX_RECURSIVE, PTHREAD_MUTEX_ERRORCHECK, or
- PTHREAD_MUTEX_DEFAULT). */
- extern int pthread_mutexattr_settype (pthread_mutexattr_t *__attr, int __kind)
- __THROW;
- /* Return in *KIND the mutex kind attribute in *ATTR. */
- extern int pthread_mutexattr_gettype (__const pthread_mutexattr_t *__restrict
- __attr, int *__restrict __kind) __THROW;
- #endif
- /* Functions for handling conditional variables. */
- /* Initialize condition variable COND using attributes ATTR, or use
- the default values if later is NULL. */
- extern int pthread_cond_init (pthread_cond_t *__restrict __cond,
- __const pthread_condattr_t *__restrict
- __cond_attr) __THROW;
- /* Destroy condition variable COND. */
- extern int pthread_cond_destroy (pthread_cond_t *__cond) __THROW;
- /* Wake up one thread waiting for condition variable COND. */
- extern int pthread_cond_signal (pthread_cond_t *__cond) __THROW;
- /* Wake up all threads waiting for condition variables COND. */
- extern int pthread_cond_broadcast (pthread_cond_t *__cond) __THROW;
- /* Wait for condition variable COND to be signaled or broadcast.
- MUTEX is assumed to be locked before. */
- extern int pthread_cond_wait (pthread_cond_t *__restrict __cond,
- pthread_mutex_t *__restrict __mutex);
- /* Wait for condition variable COND to be signaled or broadcast until
- ABSTIME. MUTEX is assumed to be locked before. ABSTIME is an
- absolute time specification; zero is the beginning of the epoch
- (00:00:00 GMT, January 1, 1970). */
- extern int pthread_cond_timedwait (pthread_cond_t *__restrict __cond,
- pthread_mutex_t *__restrict __mutex,
- __const struct timespec *__restrict
- __abstime);
- /* Functions for handling condition variable attributes. */
- /* Initialize condition variable attribute ATTR. */
- extern int pthread_condattr_init (pthread_condattr_t *__attr) __THROW;
- /* Destroy condition variable attribute ATTR. */
- extern int pthread_condattr_destroy (pthread_condattr_t *__attr) __THROW;
- /* Get the process-shared flag of the condition variable attribute ATTR. */
- extern int pthread_condattr_getpshared (__const pthread_condattr_t *
- __restrict __attr,
- int *__restrict __pshared) __THROW;
- /* Set the process-shared flag of the condition variable attribute ATTR. */
- extern int pthread_condattr_setpshared (pthread_condattr_t *__attr,
- int __pshared) __THROW;
- #if defined __USE_UNIX98 || defined __USE_XOPEN2K
- /* Functions for handling read-write locks. */
- /* Initialize read-write lock RWLOCK using attributes ATTR, or use
- the default values if later is NULL. */
- extern int pthread_rwlock_init (pthread_rwlock_t *__restrict __rwlock,
- __const pthread_rwlockattr_t *__restrict
- __attr) __THROW;
- /* Destroy read-write lock RWLOCK. */
- extern int pthread_rwlock_destroy (pthread_rwlock_t *__rwlock) __THROW;
- /* Acquire read lock for RWLOCK. */
- extern int pthread_rwlock_rdlock (pthread_rwlock_t *__rwlock) __THROW;
- /* Try to acquire read lock for RWLOCK. */
- extern int pthread_rwlock_tryrdlock (pthread_rwlock_t *__rwlock) __THROW;
- # ifdef __USE_XOPEN2K
- /* Try to acquire read lock for RWLOCK or return after specfied time. */
- extern int pthread_rwlock_timedrdlock (pthread_rwlock_t *__restrict __rwlock,
- __const struct timespec *__restrict
- __abstime) __THROW;
- # endif
- /* Acquire write lock for RWLOCK. */
- extern int pthread_rwlock_wrlock (pthread_rwlock_t *__rwlock) __THROW;
- /* Try to acquire write lock for RWLOCK. */
- extern int pthread_rwlock_trywrlock (pthread_rwlock_t *__rwlock) __THROW;
- # ifdef __USE_XOPEN2K
- /* Try to acquire write lock for RWLOCK or return after specfied time. */
- extern int pthread_rwlock_timedwrlock (pthread_rwlock_t *__restrict __rwlock,
- __const struct timespec *__restrict
- __abstime) __THROW;
- # endif
- /* Unlock RWLOCK. */
- extern int pthread_rwlock_unlock (pthread_rwlock_t *__rwlock) __THROW;
- /* Functions for handling read-write lock attributes. */
- /* Initialize attribute object ATTR with default values. */
- extern int pthread_rwlockattr_init (pthread_rwlockattr_t *__attr) __THROW;
- /* Destroy attribute object ATTR. */
- extern int pthread_rwlockattr_destroy (pthread_rwlockattr_t *__attr) __THROW;
- /* Return current setting of process-shared attribute of ATTR in PSHARED. */
- extern int pthread_rwlockattr_getpshared (__const pthread_rwlockattr_t *
- __restrict __attr,
- int *__restrict __pshared) __THROW;
- /* Set process-shared attribute of ATTR to PSHARED. */
- extern int pthread_rwlockattr_setpshared (pthread_rwlockattr_t *__attr,
- int __pshared) __THROW;
- /* Return current setting of reader/writer preference. */
- extern int pthread_rwlockattr_getkind_np (__const pthread_rwlockattr_t *__attr,
- int *__pref) __THROW;
- /* Set reader/write preference. */
- extern int pthread_rwlockattr_setkind_np (pthread_rwlockattr_t *__attr,
- int __pref) __THROW;
- #endif
- #ifdef __USE_XOPEN2K
- /* The IEEE Std. 1003.1j-2000 introduces functions to implement
- spinlocks. */
- /* Initialize the spinlock LOCK. If PSHARED is nonzero the spinlock can
- be shared between different processes. */
- extern int pthread_spin_init (pthread_spinlock_t *__lock, int __pshared)
- __THROW;
- /* Destroy the spinlock LOCK. */
- extern int pthread_spin_destroy (pthread_spinlock_t *__lock) __THROW;
- /* Wait until spinlock LOCK is retrieved. */
- extern int pthread_spin_lock (pthread_spinlock_t *__lock) __THROW;
- /* Try to lock spinlock LOCK. */
- extern int pthread_spin_trylock (pthread_spinlock_t *__lock) __THROW;
- /* Release spinlock LOCK. */
- extern int pthread_spin_unlock (pthread_spinlock_t *__lock) __THROW;
- /* Barriers are a also a new feature in 1003.1j-2000. */
- extern int pthread_barrier_init (pthread_barrier_t *__restrict __barrier,
- __const pthread_barrierattr_t *__restrict
- __attr, unsigned int __count) __THROW;
- extern int pthread_barrier_destroy (pthread_barrier_t *__barrier) __THROW;
- extern int pthread_barrierattr_init (pthread_barrierattr_t *__attr) __THROW;
- extern int pthread_barrierattr_destroy (pthread_barrierattr_t *__attr) __THROW;
- extern int pthread_barrierattr_getpshared (__const pthread_barrierattr_t *
- __restrict __attr,
- int *__restrict __pshared) __THROW;
- extern int pthread_barrierattr_setpshared (pthread_barrierattr_t *__attr,
- int __pshared) __THROW;
- extern int pthread_barrier_wait (pthread_barrier_t *__barrier) __THROW;
- #endif
- /* Functions for handling thread-specific data. */
- /* Create a key value identifying a location in the thread-specific
- data area. Each thread maintains a distinct thread-specific data
- area. DESTR_FUNCTION, if non-NULL, is called with the value
- associated to that key when the key is destroyed.
- DESTR_FUNCTION is not called if the value associated is NULL when
- the key is destroyed. */
- extern int pthread_key_create (pthread_key_t *__key,
- void (*__destr_function) (void *)) __THROW;
- /* Destroy KEY. */
- extern int pthread_key_delete (pthread_key_t __key) __THROW;
- /* Store POINTER in the thread-specific data slot identified by KEY. */
- extern int pthread_setspecific (pthread_key_t __key,
- __const void *__pointer) __THROW;
- /* Return current value of the thread-specific data slot identified by KEY. */
- extern void *pthread_getspecific (pthread_key_t __key) __THROW;
- /* Functions for handling initialization. */
- /* Guarantee that the initialization function INIT_ROUTINE will be called
- only once, even if pthread_once is executed several times with the
- same ONCE_CONTROL argument. ONCE_CONTROL must point to a static or
- extern variable initialized to PTHREAD_ONCE_INIT.
- The initialization functions might throw exception which is why
- this function is not marked with __THROW. */
- extern int pthread_once (pthread_once_t *__once_control,
- void (*__init_routine) (void));
- /* Functions for handling cancellation. */
- /* Set cancelability state of current thread to STATE, returning old
- state in *OLDSTATE if OLDSTATE is not NULL. */
- extern int pthread_setcancelstate (int __state, int *__oldstate);
- /* Set cancellation state of current thread to TYPE, returning the old
- type in *OLDTYPE if OLDTYPE is not NULL. */
- extern int pthread_setcanceltype (int __type, int *__oldtype);
- /* Cancel THREAD immediately or at the next possibility. */
- extern int pthread_cancel (pthread_t __cancelthread);
- /* Test for pending cancellation for the current thread and terminate
- the thread as per pthread_exit(PTHREAD_CANCELED) if it has been
- cancelled. */
- extern void pthread_testcancel (void);
- /* Install a cleanup handler: ROUTINE will be called with arguments ARG
- when the thread is cancelled or calls pthread_exit. ROUTINE will also
- be called with arguments ARG when the matching pthread_cleanup_pop
- is executed with non-zero EXECUTE argument.
- pthread_cleanup_push and pthread_cleanup_pop are macros and must always
- be used in matching pairs at the same nesting level of braces. */
- #define pthread_cleanup_push(routine,arg)
- { struct _pthread_cleanup_buffer _buffer;
- _pthread_cleanup_push (&_buffer, (routine), (arg));
- extern void _pthread_cleanup_push (struct _pthread_cleanup_buffer *__buffer,
- void (*__routine) (void *),
- void *__arg) __THROW;
- /* Remove a cleanup handler installed by the matching pthread_cleanup_push.
- If EXECUTE is non-zero, the handler function is called. */
- #define pthread_cleanup_pop(execute)
- _pthread_cleanup_pop (&_buffer, (execute)); }
- extern void _pthread_cleanup_pop (struct _pthread_cleanup_buffer *__buffer,
- int __execute) __THROW;
- /* Install a cleanup handler as pthread_cleanup_push does, but also
- saves the current cancellation type and set it to deferred cancellation. */
- #ifdef __USE_GNU
- # define pthread_cleanup_push_defer_np(routine,arg)
- { struct _pthread_cleanup_buffer _buffer;
- _pthread_cleanup_push_defer (&_buffer, (routine), (arg));
- extern void _pthread_cleanup_push_defer (struct _pthread_cleanup_buffer *__buffer,
- void (*__routine) (void *),
- void *__arg) __THROW;
- /* Remove a cleanup handler as pthread_cleanup_pop does, but also
- restores the cancellation type that was in effect when the matching
- pthread_cleanup_push_defer was called. */
- # define pthread_cleanup_pop_restore_np(execute)
- _pthread_cleanup_pop_restore (&_buffer, (execute)); }
- extern void _pthread_cleanup_pop_restore (struct _pthread_cleanup_buffer *__buffer,
- int __execute) __THROW;
- #endif
- #ifdef __USE_XOPEN2K
- /* Get ID of CPU-time clock for thread THREAD_ID. */
- extern int pthread_getcpuclockid (pthread_t __thread_id,
- __clockid_t *__clock_id) __THROW;
- #endif
- /* Functions for handling signals. */
- #include <bits/sigthread.h>
- /* Functions for handling process creation and process execution. */
- /* Install handlers to be called when a new process is created with FORK.
- The PREPARE handler is called in the parent process just before performing
- FORK. The PARENT handler is called in the parent process just after FORK.
- The CHILD handler is called in the child process. Each of the three
- handlers can be NULL, meaning that no handler needs to be called at that
- point.
- PTHREAD_ATFORK can be called several times, in which case the PREPARE
- handlers are called in LIFO order (last added with PTHREAD_ATFORK,
- first called before FORK), and the PARENT and CHILD handlers are called
- in FIFO (first added, first called). */
- extern int pthread_atfork (void (*__prepare) (void),
- void (*__parent) (void),
- void (*__child) (void)) __THROW;
- /* Terminate all threads in the program except the calling process.
- Should be called just before invoking one of the exec*() functions. */
- extern void pthread_kill_other_threads_np (void) __THROW;
- __END_DECLS
- #endif /* pthread.h */